Combined jack and drop.



R. M. DB VIGNIER. COMBINED JACK AND DROP.

AYPLIOATION FILED DEC. 27, 1911.

1,092,964. Patented Apr. 14, 1914.

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ROBERT M. DE VIGNIER, OF HOLLIS TERRACE, NEW YORK, ASSIGNOR TO WESTERN ELECTRIC COMPANY, OF NEW YORK, N. Y., A CORPORATION OF ILLINOIS.

COMBINED JACK AND DROP.

Specification of Letters Patent.

Application filed December 27, 1911.

Patented Apr. 14, 1914.. Serial No. 668,180.

To all whom it may concern:

Be it known that I, ROBERT M. DE VIGNIER, citizen of the United States, residing at Hollis Terrace, in the county of Queens and btate ofNew York, have invented a certain new and useful Improvement in Combined Jacks and Drops, of which the following is a full, clear, concise, and exact description.

This invention relates to a combined jack and drop, more particularly to a combined jack and drop of the self-restoring type.

The general object of this invention is to provide a combined jack and drop of the self-restoring type which will be cheap to manufacture, efficient and positive in its operation, and in which all parts are readily accessible for repair and replacement.

Specifically considered my invention relates particularly to the manner of mounting the jack springs and the restoring lever, and to the manner in which the various parts of the mechanism are attached to the mounting plate so as to provide for easy assembling and dismantling of the device.

In the accompanying drawings illustrating this invention-Figure 1 is a perspective view of the combined jack and drop with the drop and its supporting plate shown detached and with the jack sleeve shown in section; Fig. 2 is a side elevation with the forward portion shown in section; Fig. 3 is a front view of the device as it appears when mounted in a switchboard; and Fig. 4 is a rear end elevation.

Referring to Figs. 1 and 3, the magnet shell 10 incasing the electromagnet is supported upon the face plate 11 by means of the screws 12 and 13. The screws 12 and 13 also clamp the signal plate 14 to the face plate 11. The signal plate 14 is provided at its upper portion with a notch 15 through which passes the drop-engaging hook 16. On both sides of the notch 15 are forwardly extending lugs 17 and 18 which serve he purpose of protecting the drop-engaging hook 16 when the drop is down. On the lower portion of the plate 14 are trunnions 19 and 20 which engage with bearings 21 in the cars 28. In'the center of the plate 14 is an orifice into which fits the head of the screw 25.

The drop 22 is semi-elliptical in shape and is provided at its upper portion with the opening 26 through which passes the dropengaging hook 16. The opening 26 is provided with a forward projecting portion or hood 27, the inner surface of which has a cam function, in that the lifting of the hook 16 acts upon said inner cam-like surface, pushing the upper portion of the drop 22 forward, and thereby giving the shutter a posltive opening motion. In restoring the shutter 22 the said inner surface of the hood 27 acts positively to engage the hook 16 with the drop 22. A number plate 39 is attached to the drop 22 by means of the inwardly extending projections 40 and 41. From the lower portion of the shutter 22 extends the backwardly curved tongue 29 with which the curved or hook-shaped extremity 30 of the drop-restoring lever 31 engages.

The drop-restoring lever 31 is fulcrumed in the forward extensions 36 of the depending bracket 33 which is electrically welded to the magnet shell. The drop-restoring lever 31 extends forward beneath and parallel to the magnet shell 10. After passing through the opening 80 in the face plate 11, the forward end of the lever 31 is turned upward, forming the curved portion or hook 30. When the drop-restoring lever 31 is moved upward, the curved end acts upon the tongue 29 thereby restoring the drop or shutter 22 to its normal or closed position. Midway of the ends of the drop-restoring lever 31 and between said lever and the jack spring 34 is an insulating member 35 fastened to the jack springs 34 by means of a pin extension 37 which extends through and fits tightly in a hole in the spring 34. Any upward movement of the jack spring 34 therefore results in a corresponding upward movement of the drop-restoring lever 31. The pivoting of the lever 31 upon the bracket 33 and the forward position of the applied force result in a greatly increased mechanical advantage in the droprestoring mechanism, in that the construction employed uses the leverage obtained by increasing the moment of the applied force about the fulcrum. Also, the drop-restoring lever 31 being pivoted and not included in the spring pile-up further reduces the force necessary to restore the shutter 22, in that the tension of the spring heretofore used does not, in this invention, have to be acted against.

The armature 46 is mounted upon its supporting frame 47 by the pivot screws 48 and 49. The hook 16 is fastened to the upper portion 54 of the armature 46 midway of the screws 48 and 49. The supporting frame 47 is attached to the magnet shell 10. A guard 53 formed integral with the frame 47 passes over the hook 16; The armature 46 is circular in form with an upper portion extended to form the pivot block 54. The armature 46 is cut away at 55 and 56 to permit the entrance of the terminals 57 and 58 and also to allow the removal of the armature 46 from the magnet shell 10 without interfering with any of the other parts of the device.

The forward end of the core of the electromagnet 59 (Fig. 2) is tapped for the reception of the screw 25, said screw clamping the magnet core 59 firmly in place against the front head of the magnet shell 10, thereby establishing magnetic connection between the core 59 and the shell 10. Upon thecore 59 is wound the coil 60. The spool heads 62 and 63 are formed of insulating material and are secured upon the ends of the core 59. Projecting through the rear spool head 63 are the terminals 57 and 58; attached to the terminals 57 and 58 are the conductors 64 and 65 connecting said terminals with the conductor screws 66 and 67, said screws being mounted in the lateral extensions 68 and 69 of the anvil springs 70 and 71. To remove the electromagnet it is only necessary to remove the armature 46 as explained above, remove screw 25, detach conductors 64 and 65 by loosening screws 66 and 67, and then withdraw the electromagnet from its inclosing shell 10.

The spring pile-up is of the usual form, consisting of the two anvil springs 70 and 71, the plug contact springs 34 and 73 and the night alarm contact spring 74. In line with the plug contact springs and fastened to the face plate 11 is the jack sleeve 81, which is fastened to but insulated from the face plate 11.

The operation of the device is as follows: Current being sent through the electromagnet 60 by the calling subscriber, the dropretaining hook 16 is raised by the movement of the armature 46 in being attracted to the rear end of the shell 10 and the core 59. This lifting of the hook in addition to releasing the shutter or drop 22 forces the shutter 22 forward with the result that the drop 22 falls. On inserting a plug into the jack the operator causes the contact spring 34 to move upward which results in the upward movement of the lever 31. The raising of the lever 31 causes the curved or hooked end 30 of said lever to act upon the curved tongue 29, with the result that the Copies of this patent may be obtained for extension.

drop is restored to its normal or closed position and secured in this position by the drop-retaining hook 16. r

In this invention the wear on the plug and contact spring in performing the operations of making contact and restoring the drop are reduced, due to the fact that less pressure is brought to bear on' the plug by the contact spring 34 as a result of the long drop-restoring lever 31, and its pivoted hearing; thereby dispensing with the double spring pressure found in previous jacks of this type; I/Vithdrawing the plug does not change the position of the shutter 22, the latter remaining closed after the insertion of the plugand until the electromagnet is energized by another call. The plug also performs its usual functions of establishing contact with the contact springs, jack sleeves, and disconnecting the drop-releasing electromagnet from the circuit.

I claim: 7

1. In a combined jack and drop, a supporting plate, a magnet shell mounted on the rear thereof, a drop shutter mountedvon the front of said plate, an armature and latch for controlling said shutter, a dependent lug having a rearward extension and forward extensions mounted on the rear of the magnet shell, a restoring lever pivotally mounted in said forward extensions, and jack springsmounted upon said rearward 2. I11 a combined jack and drop, a front supporting plate, a magnet shell located at the rear thereof, a signal platelocated on the front of said supporting plate, unitary means for securing said magnet shell and said signal plate to said supporting plate, a magnet coil located within said shell, a screw passing freely through said signal plate and said supporting plate and shell for holding said coil within said shell, a shutter pivotally mounted on said signal plate, an armature and latch pivotally mounted on said shell for controlling said shutter, a dependent lug having a rearward extension and forward extensions mounted on the rear of said magnet shell, a lever pivotally mounted on said forward extensions, and coiiperating with said shutter to effect its restoration, jack springs mounted upon the rear extension of said dependent lug, and means connecting one of said jack springs with said lever. V V In witness whereof, I, hereunto subscribe my name this 22d day of Dec. A. 1)., 1911. ROBERT M. on VIGNIER. Witnesses IRVING MAoDoNALD,

I WV. F. HOFFMAN.

five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

